Arid Archway is more powerful, but you usually only need one or two Archways to get enough value
Moving from the original series all the way to Yu-Gi-Oh
The trigger event doesn't have to specifically refer to "creatures." In these cases, the trigger event may also refer to something being "put into a graveyard from the battlefield." For example, an ability that triggers "whenever an artifact is put into a graveyard from the battlefield" would trigger twice if an artifact creature dies while Drivnod, Carnage Dominus is on the battlefield
Just yesterday, for example, trirayoute noticed that their French copy of Summon: Fat Chocobo had two Chapter IIIs, rather than a III and a IV
Something else new to this set is Mutagen Tokens , which read as the following: "1 (Mana), Sacrifice this token: Put a +1/+1 counter on a target creature
Then you can put them into a plastic case to prevent them from getting bent